The flag is not needed to be set when use these flags:
'.all_filesystems', '.format_device', '.mntpoint', '.mount_device'
'.needs_checkpoints', '.needs_device', '.resource_file'.
These flags imply creating temporary directory.

Reviewed-by: Petr Vorel <pvorel@suse.cz>
Acked-by: Cyril Hrubis <chrubis@suse.cz>
Signed-off-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
Signed-off-by: Petr Vorel <pvorel@suse.cz>